The TPS53128 is a dual, adaptive on-time D-CAP2™ mode synchronous buck controller. The part enablessystem designers to cost effectively complete the suite of various end equipment's power bus regulators with alow external component count and low standby consumption. The main control loop for the TPS53128 uses theD-CAP2™ Mode topology which provides a very fast transient response with no external component.The TPS53128 also has a proprietary circuit that enables the device to adapt not only low equivalent seriesresistance (ESR) output capacitors such as POSCAP/SP-CAP, but also ceramic capacitor. The fixed frequencyemulated adaptive on-time control supports seamless operation between PWM mode at heavy load conditionand reduced frequency operation at light load for high efficiency down to milliampere range. The part provides aconvenient and efficient operation with conversion voltages from 4.5 V to 24 V and output voltage from 0.76 V to5.5 V.The TPS53128 is available in 4-mm x 4-mm 24 pin QFN (RGE) or 24 pin TSSOP (PW) packages, and isspecified from -40°C to 85°C ambient temperature range.
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